Stop device and aerial vehicle using the same

ABSTRACT

A stop device includes a motor rotor assembly including a rotating shaft, a first shift lever fixedly connected to the rotating shaft and including a first shifting part configured to rotate around an axis of the rotating shaft to form a first motion trajectory, and a second shift lever rotatably connected to the first shift lever and including a second shifting part partially within the first motion trajectory. The first shifting part is configured to drive the second shifting part to rotate around the axis of the rotating shaft to form a second motion trajectory. The stop device further includes a motor stator assembly sleeved on the rotating shaft and rotatably connected with the rotating shaft. The motor stator assembly includes a stopping boss located on a periphery of the first motion trajectory and partially within the second motion trajectory.

CROSS-REFERENCE TO RELATED APPLICATION

This is a continuation application of international Application No.PCT/CN2014/081766, filed on Jul. 7, 2014, the entire contents of whichare incorporated herein by reference.

TECHNICAL FIELD

The present disclosure relates to a field of aerial vehicles, andparticularly to a stop device and an aerial vehicle using the same.

BACKGROUND

In the field of aerial photography a single-revolution limited rotationstructure that limits a rotation to one revolution is often utilized toobtain a wide range of shooting angle. However, this structure suffersfrom a drawback that it may not be able to make a full 360° rotation dueto the stopping action of a stopper, leading to an insufficient shootingangle. In order to address this issue, an indefinite full-revolutionrotation structure may be utilized in the prior art; however, unlimitedrotations of this structure due to the absence of the stopping action ofthe stop device may easily cause flexible printed circuit board (FPC)wiring to break, thereby reducing service life of the FPC.

SUMMARY

An object of the present disclosure is to provide a stop device having astopping action with a rotation angle greater than 360° and less than720°, and an aerial vehicle using the same.

In order to address the aforementioned technical problem, the presentdisclosure provides a stop device, which may comprise a motor rotorassembly including a rotating shaft, a first shift lever fixedlyconnected to the rotating shaft and comprising a first shifting partconfigured to rotate around an axis of the rotating shaft to form afirst motion trajectory, and a second shift lever rotatably connected tothe first shift lever and comprising a second shifting part partiallywithin the first motion trajectory. The first shifting part isconfigured to drive the second shifting part to rotate around the axisof the rotating shaft to form a second motion trajectory. The stopdevice may further comprise a motor stator assembly sleeved on therotating shaft and rotatably connected with the rotating shaft. Themotor stator assembly comprises a stopping boss located on a peripheryof the first motion trajectory and partially within the second motiontrajectory. The first shift lever may rotate to drive the first shiftlever to rotate for a total rotation angle greater than 360° and lessthan 720°.

Optionally, the rotating shaft is configured to drive the first shiftlever and the second shift lever to rotate in a first direction untilthe second shifting part is brought into contact with the stopping boss,drive the first shift lever to rotate in a second direction opposite tothe first direction until the first shifting part is brought intocontact with the second shifting part, and drive, after the firstshifting part is brought into contact with the second shifting part, thefirst shift lever and the second shift lever to rotate in the seconddirection.

Optionally, the rotating shaft is configured to drive the first shiftlever and the second shift lever to rotate in the first direction untilthe second shifting part is brought into contact with the stopping boss,drive the first shift lever to continue to rotate in the first directionuntil the first shifting part comes into contact with the secondshifting part, and rotate in the second direction opposite to the firstdirection to drive the first shift lever and the second shift lever torotate in the second direction.

Optionally, the motor stator assembly may comprise a receiving grooveand the rotating shaft may pass through the receiving groove, and eachof the first shift lever, the second shift lever and the stopping bossmay be located within the receiving groove.

Optionally, a distance between the first shifting part and the axis ofthe rotating shaft may be less than a distance between the stopping bossand the axis of the rotating shaft, and a distance between the secondshifting part and the axis of the rotating shaft may be greater than thedistance between the stopping boss and the axis of the rotating shall.

Optionally, the motor rotor assembly may comprise a housing, and therotating Shaft may be arranged at a center of the housing.

Optionally, the rotating shaft may comprise a first connecting partarranged at the center of the housing and a second connecting partarranged on the first connecting part. The second connecting partincludes a first rotation stopping position. The first shift lever maycomprise a first rotating part arranged on the second connecting part.The first rotating part includes a second rotation stopping position.The first rotation stopping position and the second rotation stoppingposition may fit with each other to restrict the first rotating partfrom rotating relative to the rotating shaft.

Optionally, the first rotation stopping position may be a firsttangential section arranged on the second connecting part, and thesecond rotation stopping position may be a second tangential sectionarranged on the first rotating part.

Optionally, the stop device may further comprise a locking nut, and therotating shaft may further comprise a third connecting part on which thelocking nut may be threadedly connected.

Optionally, the stop device may further comprise a sleeve memberconnected between the first shift lever and the second shift lever toreduce a rotational friction between the first shift lever and thesecond shift lever.

Optionally, the sleeve member may be a copper sleeve and the sleevemember may be fixedly arranged on the rotating shaft. An end face of thesleeve member may be against an end face of the first rotating pair, andthe second shift lever may be sleeved on a periphery of the sleevemember and rotate relative to the sleeve member.

Accordingly, the present disclosure further provides an aerial vehiclewhich may comprise the aforementioned stop device and a payload, wherethe payload may be rotatably connected with the stop device, and thestop device may drive the payload to rotate.

Optionally, the payload may be a camera assembly.

The stop device according to the present disclosure may be provided withthe rotating shaft, the first shift lever and the second shift lever todrive the rotation of the first shift lever and the second shift leverby the rotating shaft, and may be provided with the stopping boss suchthat the rotation of the first shift lever and the second shift levermay be stopped due to the stopping action of the stopping boss. Thefirst shift lever may then rotate in a reverse direction, without thesecond shift lever rotating along, for about a full revolution until thefirst shifting part comes into contact with the second shifting partagain. After that, the first and second shift levers can rotate togetherin the reverse direction for about one full revolution until the secondshifting part comes into contact with the stopping boss again. In someother embodiments, the rotation of the second shift lever may be stoppeddue to the stopping action of the stopping boss, while the first shiftlever may continue to rotate until the first shifting part comes intocontact with the second shifting part and stops rotating. As such, thefirst shift lever can rotate by an angle greater than 360° and less than720°.

BRIEF DESCRIPTION OF THE DRAWINGS

Drawings to which the reference is made in various embodiments of thepresent disclosure will be briefly described below to clearly illustratethe technical solution as provided by the present disclosure. It isapparent that the drawings described below are merely illustrative ofsome of the embodiments of the disclosure, and those ordinarily skilledin the art can further derive other drawings from the drawings belowwithout arty inventive effort. In the drawings:

FIG. 1 is a schematic diagram of an aerial vehicle provided by theembodiments of the present disclosure;

FIG. 2 is a schematic diagram of a stop device provided by theembodiments of the present disclosure;

FIG. 3 is a schematic diagram of a first shift lever provided by theembodiments of the present disclosure;

FIG. 4 is a schematic diagram of a motor stator assembly provided by theembodiments of the present disclosure;

FIG. 5 is an assembly diagram of the stop device provided by theembodiments of the disclosure;

FIG. 6 is a schematic diagram of a first motion trajectory provided bythe embodiments of the present disclosure;

FIG. 7 is a schematic diagram of a second motion trajectory provided bythe embodiments of the present disclosure; and

FIG. 8 is a schematic diagram of a payload provided by the presentdisclosure.

DETAILED DESCRIPTION OF THE EMBODIMENTS

The technical solutions according to the embodiments of the presentdisclosure will be clearly and fully described below with reference tothe drawings.

Referring to FIG. 1, there is illustrated an aerial vehicle 100according to the embodiments of the present disclosure. The aerialvehicle 100 may comprise a rotatable stop device 1 and a payload 2rotatably connected on the stop device 1.

Referring to FIGS. 2 to 5, the stop device 1 may comprise a motor rotorassembly 10, a motor stator assembly 20, a first shift lever 30, asecond shift lever 40, a boss 50 and a sleeve member 60. The motor rotorassembly 10 may comprise a rotating shaft 11. The motor stator assembly20 may be sleeved on the rotating shaft 11. The rotating shaft 11 may becapable of rotating relative to the motor stator assembly 20. The firstshift lever 30 may be fixedly connected to the rotating shaft 11, andthe rotating shaft 11 may drive the first shift lever 30 to rotate. Thesecond shift lever 40 may be rotatably connected to the first shiftlever 30, and the boss 50 may be arranged in the motor stator assembly20, and the sleeve member 60 may be connected between the first shiftlever and the second shift lever.

The motor rotor assembly 10 may further comprise a housing 12, and therotating shaft 11 may be arranged at the center of the housing 12. Inparticular, the housing 12 may be provided with a receiving cavity 12 a,and the rotating shaft 11 may be arranged at the center of the receivingcavity 12 a. The motor rotor assembly 10 may further comprise a rotatingrod 13 arranged on a periphery of the housing 12. In some embodiments,the rotating rod 13 may be formed integrally with the housing 12 foreasy manufacture. Of course, in other embodiments, the rotating rod 13may also be fixedly arranged on the housing 12 through other means, suchas welding or screw connections. The payload 2 may be rotatablyconnected to the rotating rod 13.

In some embodiments, the rotating shaft 11 may be a stepped shaft toachieve multistage connection. The rotating shaft 11 may comprise afirst connecting part 11 a, a second connecting part 11 b and a thirdconnecting part 11 c. The first connecting part 11 a may be arranged atthe center of the receiving cavity 12 a. The second connecting part 11 bmay be arranged on the first connecting part 11 a, and a first rotationstopping position 111 may be arranged on the second connecting part 11b. In particular, the first rotation stopping position 111 may be afirst tangential section arranged on the second connecting part 11 b.The third connecting part 11 c may be arranged on the second connectingpart 11 b, and may be provided with external thread (not shown). Thatis, the second connecting part 11 b may be arranged between the firstconnecting part 11 a and the third connecting part 11 c.

The motor stator assembly 20 may comprise a bearing plate 21 and a base22, and the bearing plate 21 may be threadedly connected with thehousing 12 for easy disassembly. The base 22 may be fixedly arranged onthe bearing plate 21. In some embodiments, the base 22 may be acylindrical structure. The base 22 may be provided with a receivinggroove 22 a, and the receiving groove 22 a may be a circular groove. Athrough-hole 221 penetrating the bearing plate 21 may be provided at thecenter of the receiving groove 22 a, and the rotating shaft 11 may passthrough the through-hole 221. Three studs 222 may be provided on a wallof the receiving groove 22 a, such that they are placed in a triangulararrangement around the center of the receiving groove 22 a. The threestuds 222 can be utilized to facilitate fixed connections of the base 22with other components.

The first shift lever 30 may be located in the receiving groove 22 a andfixedly connected to the rotating shaft 11, so that the rotating shaft11 may drive the first shift lever 30 to rotate in a first direction A,thereby allowing the first shift lever 30 to rotate by a total anglegreater than 360° and less than 720°. In particular, the first shiftlever 30 may comprise a first rotating part 31 and a first shifting part32. The first rotating part 31 may be arranged on the rotating shaft 11,and the rotating shaft 11 may drive the first rotating part 31 torotate. The first shifting part 32 may be arranged on the first rotatingpart 31.

The first rotating part 31 may be a conical structure. The firstrotating part 31 may be arranged on the second connecting part 11 b. Inparticular, a connecting hole 31 a may be provided at the center of thefirst rotating part 31, and the connecting hole 31 may be arranged suchthat the second connecting part 11 b passes therethrough. Moreparticularly, the connecting hole 31 a may be provided with a secondrotation stopping position 311, which may fit with the first rotationstopping position 111 to restrict the rotation of the first rotatingpart 31 a around the rotating shaft 11. Furthermore, the second rotationstopping position 311 may be a second tangential section arranged on theconnecting hole 31 a and may be against the first rotation stoppingposition 111 such that the connecting hole 31 a may be in clearance fitwith the second connecting part 11 b. Moreover, the first rotationstopping position 111 and the second rotation stopping position 311 mayfurther achieve transfer of an axial torque such that the first rotatingpart 31 can be kept in synchronous rotation with the rotating shaft 11.

Of course, in other embodiments, the first rotation stopping position111 and the second rotation stopping position 311 can be arrangedotherwise, for example, the first rotation stopping position 111 may bea recess or a boss provided on the second connecting part 11 b, and thenthe second rotation stopping position 311 may be a boss or a recessprovided on the first rotating part 31.

Moreover, in other embodiments, the first rotating part 31 may also bein interference fit with the rotating shaft 11, so as to achievesynchronous rotation of the first rotating part 31 and the rotatingshaft 11.

In some embodiments, the first rotating part 31 may be further providedwith a cylindrical boss 31 b; the cylindrical boss 31 b may be coaxialwith the connecting hole 31 a, and the connecting hole 31 b maypenetrate through the cylindrical boss 31 b.

The first shifting part 32 may be arranged on the first totaling part31. In some embodiments, the first shifting part 32 may be a cylindricalstructure arranged on the first rotating part 31. Of course, in otherembodiments, the first shifting part 32 may also be another structure,such as a rod-shaped structure.

The second shift lever 40 may be arranged in the receiving groove 22 a,and sleeved on the first shift lever 30. In particular, the second shiftlever 40 may comprise a second rotating part 41 and a second shiftingpart 42. The second rotating part 41 may be sleeved on the firstrotating part 31. More particularly, the second rotating part 41 may besleeved on the cylindrical boss 31 b. The second rotating part 41 may bea ring structure and in clearance it with the cylindrical boss 31 b sothat the first rotating part 31 will not drive the second rotating part41 to rotate along with it when the first rotating part 31 rotates.

The second shifting part 42 may be arranged on the second rotating part41. In particular, the second shifting part 42 may be a rod-shapedstructure arranged on the second rotating part 41, and may be formedintegrally with the second rotating part 41 for easy manufacture.

While the rotating shaft 11 is rotating, the first shifting part 32 mayrotate around the axis of the rotating shaft 11 to form a first motiontrajectory N1. The second shifting part 42 may be partially within thefirst motion trajectory N1, and the first shifting part 32 may becapable of driving the second shifting part 42 to rotate around the axisof the rotating shaft 11 to form a second motion trajectory N2 (as shownin FIG. 6). In some embodiments, the first motion trajectory N1 may be acircular trajectory. That is, the first shifting part 32 may rotatearound the axis of the rotating shaft 11 by one revolution. Of course,in other embodiments, the first motion trajectory N1 can also be an arc.

In particular, when the rotating shaft 11 drives the first shift lever30 to rotate such that the first shifting part 32 comes into contactwith second shifting part 42, the first shifting part 32 exerts on thesecond shifting part 42 a pushing force, under the effect of which thesecond shift lever 40 may by driven by the first shift lever 30 torotate in the direction of the rotation of the rotating shaft 11.

The stop device 1 may further comprise a sleeve member 60 connectedbetween the first shift lever 30 and the second shift lever 40 to reducea rotational friction between the first shift lever 30 and the secondshift lever 40. In some embodiments, the sleeve member 60 may be acopper sleeve, the sleeve member 60 may be fixedly connected to therotating shaft 11 and may be against the first shift lever 30. Thesecond shift lever 40 may be sleeved on a periphery of the sleeve member60 and rotate relative to the periphery, thus reducing the rotationalfriction between the first shift lever 30 and the second shift lever 40.In particular, the sleeve member 60 may be sleeved on the thirdconnecting part 11 c, and an end face of the sleeve member 60 may beagainst an end face of the cylindrical boss 31 b. The second rotatingpart 41 may be sleeved on the periphery of the sleeve member 60 and mayrotate relative to the sleeve member 60 so that the sleeve member 60 maybe utilized to reduce the rotational friction between the first shiftlever 30 and the second shift lever 40 when the first shift lever 30drives the second shift lever 40 to rotate. Of course, in otherembodiments, the sleeve member 60 may also be a bearing or a guide bush.

The stop device 1 may further comprise a stopping boss 50 arranged inthe motor stator assembly 20. In particular, the stopping boss 50 may belocated in the receiving groove 22 a. More particularly, the stoppingboss 50 may be arranged on a wall of the receiving groove 22 a on one ofthe studs 222, and may extend along a direction towards the center ofthe receiving groove 22 a. In some embodiments, the stopping boss 50 maybe a square block arranged on one of the studs 222. Of course, in otherembodiments, the stopping boss 50 may also be arranged at any otherlocation in the receiving groove 22 a. The stopping boss 50 may also bea structure of another shape, such as a cylindrical structure or aU-shaped block structure.

The stopping boss 50 may be located on the periphery of the first motiontrajectory N1 and may be partially within the second motion trajectoryN2 as shown in FIG. 7). In some embodiments, the second motiontrajectory N2 may be an arc trajectory. Of course, in other embodiments,the second motion trajectory N2 can also be a circular trajectory. Inparticular, during the rotation of the rotating shaft 11, when the firstshifting part 32 comes into contact with a first side of the secondshifting part 42, both the first shifting part 32 and the secondshifting part 42 may rotate along with the rotation of the rotatingshaft 11 until the second shifting part 42 comes into contact with thestopping boss 50. At this time, both the first shift lever 30 and thesecond shift lever 40 may stop rotating with a second side of the secondshilling part 42 contacting the stopping boss 50. The second side isopposite to the first side. Then, the first shift lever 30 may changethe rotation direction and rotate around the axis of the rotating shaft11 in an opposite direction (without the second shifting lever 40rotating along). When the first shifting part 32 comes into contact withthe second side of the second shifting part 42, the first shifting part32 starts to push the second shifting part 42, and hence the secondshift lever 40, to rotate together with the first shift lever 30 in thatopposite direction, until the first side of the second shifting part 42comes into contact with the stopping boss 50, at which time both thefirst shift lever 30 and the second shift lever 40 may stop rotatingagain. Thus, consistent with the present disclosure, the first shiftlever 30 can rotate by an angle greater than 360° and less than 720°.

More specifically, during the rotation of the first shift lever 30 andthe second shift lever 40 in the first direction A as driven by therotation of the rotating shaft 11, when the second shift lever 40rotates to a position such that the second shifting part 42 is broughtinto contact with the stopping boss 50, the first shift lever 30 and thesecond shift lever 40 may stop rotating due to the stopping action ofthe stopping boss 50. At this time, the second side of the secondshifting part 42 contacts the stopping boss 50. Then, the first shiftlever 30 may change the rotation direction to rotate in a seconddirection B opposite to the first direction (without the second shiftlever 40 rotating along). When the first shifting part 32 comes intocontact with the second side of the second shifting part 42, the firstshifting part 32 starts to push the second shifting part 42, and hencethe second shift lever 40, to rotate along with the first shift lever 30in the second direction B, until the first side of the second shiftingpart 42 of the second shift lever 40 comes into contact with thestopping boss 50, at which time the first shift lever 30 and the secondshift lever 40 may be stopped from moving. At this time, the rotatingshaft 11 may rotate again in the first direction A to thereby drive thefirst shift lever 30 and later the second shift lever 40 together torotate in the first direction A, and such cycle may be repeatedlyperformed. Reversal rotation of the first shift lever 30 and the secondshift lever 40 may be achieved through the reversal rotation of therotating shaft 11.

In some other embodiments, during the rotation of the rotating shaft 11,when the first shifting part 32 comes into contact with the second sideof the second shifting part 42, both the first shifting part 32 and thesecond shifting part 42 may rotate along with the rotation of therotating shaft 11 until the second shifting part 42 comes into contactwith the stopping boss 50 where the second shift lever 40 may stoprotating with the second side of the second shifting part 42 contactingthe stopping boss 50, and the first shifting part 32 may continue torotate around the axis of the rotating shaft 11 and approach the secondshifting part 42 from the first side of the second shifting part 42.When the first shifting part 32 comes into contact with the first sideof the second shifting part 42, the rotating shaft 11, the first shiftlever 30, and the second shift lever 40 may be stopped from rotating,thereby allowing the first shift lever 30 to rotate by an angle greaterthan 360° and less than 720°.

More specifically, during the rotation of the first shift lever 30 andthe second shift lever 40 in the first direction A as driven by therotation of the rotating shaft 11, when the second shift lever 40 isrotated such that the second shifting part 42 is brought into contactwith the stopping boss 50, the second shift lever 40 may stop rotatingdue to the stopping action of the stopping boss 50, and the first shiftlever 30 may continue to rotate until it comes into contact with thesecond shift lever 40 and stops rotating. At this time, the rotatingshaft 11 may change the rotation direction to rotate in the seconddirection B to thereby drive the first shift lever 30 and the secondshift lever 40 to rotate in the second direction B until the secondshifting part 42 of the second shift lever 40 comes into contact withthe stopping boss 50 again so that the second shift lever 40 may bestopped from moving with the first side of the second shifting part 42contacting the stopping boss 50, and the first shift lever 30 maycontinue to rotate around the axis of the rotating shaft 11 until thefirst shifting part 32 comes into contact with the second side of thesecond shift lever 40. At this time, the rotating shaft 11 may changethe rotation direction again to rotate in the first direction A tothereby drive the first shift lever 30 and the second shift lever 40 torotate in the first direction A. Such cycle may be repeatedly performed.Reversal rotation of the first shift lever 30 and the second shift lever40 may be achieved through the reversal rotation of the rotating shaft11.

In some embodiments (referring to the angle of view in FIG. 5), thesecond direction B may be opposite to the first direction A. Inparticular, the first direction A may be a clockwise direction, and thesecond direction B may be an anticlockwise direction. Of course, inother embodiments, the first direction A can also be an anticlockwisedirection, and the second direction B can also be a clockwise direction.

Furthermore, a distance between the first shifting part 32 and the axisof the rotating shaft 11 may be less than a distance between thestopping boss 50 and the axis of the rotating shaft 11 so that the firstshift lever 30 may not be affected by the stopping action of thestopping boss 50, thereby allowing the first shift lever 30 to rotatearound the axis of the rotating shaft 11 until the first shift lever 30is stopped from rotating together with the second shift lever 40 due tothe stopping action of the stopping boss 50 in some of theabove-described embodiments, or allowing the first shift lever 30 tocontinue to rotate around the axis of the rotating shaft 11 when thesecond shift lever 40 is stopped from rotating due to the stoppingaction of the stopping boss 50 in some of the above-describedembodiments. Of course, in other embodiments, the first shift lever 30may also be made to be free of the stopping action of the stopping boss50 by defining the relationship between a height of the stopping boss 50in the receiving groove 22 a and a height of the first shifting part 32.

Furthermore, a distance between the second shifting part 42 and the axisof the rotating shaft 11 may be greater than the distance between thestopping boss 50 and the axis of the rotating shaft 11 so that themotion position of the second shift lever 40 may be constrained by thestopping action of the stopping boss 50 during the movement of thesecond shift lever 40. Of course, in other embodiments, the relationshipin height between the second shifting part 42 and the stopping boss 50may likewise be defined to achieve the stopping effect in theseembodiments.

The stop device 1 may further comprise a locking nut 70 arranged on therotating shaft 11. In particular, the locking nut 70 may be threadedlyconnected with the third connecting part 11 c, and configured to providean axial pre-tightening force to prevent the second shift lever 40 fromslipping off from the first shift lever 30. Moreover, the locking nut 70may be further configured to provide a pre-tightening force so as tofixedly connect the motor stator assembly 20 with the motor rotorassembly 10.

The stop device 1 may further comprise a wiring box 80 arranged on themotor rotor assembly 10. In particular, the wiring box 80 may bereceived in the receiving cavity 12 a of the housing 12. Flexibleprinted circuit board (FPC) wiring 81 may be arranged in the wiring box80, with one end thereof being wound on the rotating shaft 11.Furthermore, one end of the FPC wiring 81 may be wound on the firstconnecting part 11 a. When the motor rotor assembly 10 rotates in thefirst direction A, the FPC wiring 81 may bring the rotating shaft 11into rotation. Because the first shift lever 30 and the second shiftlever 40 rotate to come into contact with the stopping boss 50, thesecond shift lever 40 may be stopped from rotating further by thestopping boss 50. The rotating shaft 11 may rotate in the seconddirection B to drive the first shift lever 30 to rotate in the seconddirection B, thus avoiding the FPC wiring 81 from being damaged due torotation by multiple revolutions in the same direction to thereby extendthe service life of the FPC wiring 81.

Referring to FIG. 8, the payload 2 may be rotatably connected to thestop device 1, and the stop device 1 may drive the payload 2 to rotate.In some embodiments, the payload 2 may be a camera assembly. Of course,in other embodiments, the payload 2 may also be a micro-computer, aprojector, or the like. In particular, the payload 2 may comprise acamera 2 a and a connecting rod 2 b, wherein a first rotating shaft 211and a second rotating shaft 212 may be arranged on the camera 2 a, andboth ends of the connecting rod 2 b may be rotatably connected to thefirst rotating shaft 211 and the second rotating shaft 212,respectively. When the connecting rod 2 b is rotated, it may drive thecamera 2 a to rotate. One end of the rotating rod 13 far from thehousing 12 may be rotatably connected to the first rotating shaft 211 sothat the rotating rod 13 may drive a rotation of the first rotatingshaft 211 when the motor rotor assembly 10 rotates, thereby driving therotation of the camera 2 a.

Furthermore, when the aerial vehicle 100 is used for aerial photographyequipment, the rotating shaft 11 may drive the first shift lever 30 torotate in the first direction A so that the rotating rod 13 may drivethe payload to rotate. When the second shift lever 40 is brought intocontact with the stopping boss 50 by the rotation of the first shiftlever 30 and the second shift lever 40, the second shift lever 40 maystop rotating, and the first shift lever 30 may continue to rotatearound the axis of the rotating shaft 11 until it comes into contactwith the second shift lever 40, thus stopping the rotation of therotating shaft 11 and the first shift lever 30. At this time, thepayload 2 may stop rotating so that when the first shift lever 30rotates by a total angle greater than 360° and less than 720°, thecamera 2 a may be driven by the rotating rod 13 to also rotate by atotal angle greater than 360° and less than 720°, thereby obtaining awider shooting angle of the camera 2 a. Moreover, as the first shiftlever 30 rotates in the first direction A by at least one revolutionduring its rotation, the shooting direction of the camera 2 a may be inthe same direction to avoid repeated shooting of a scene caused by thereturning of the camera 2 a in a reverse direction after rotating by onerevolution, thereby allowing the scene to be Shot more completely by thecamera 2 a.

The stop device according to the present disclosure may be provided withthe rotating shaft, the first shift lever and the second shift lever todrive the rotation of the first shift lever and the second shift leverby the rotating shaft, and may be provided with the stopping boss sothat the rotation of the second shift lever may be stopped due to thestopping action of the stopping boss, while the first shift lever maycontinue to rotate until it comes into contact with the second shiftlever and stops rotating, thereby allowing the first shift lever torotate by an angle greater than 360° and less than 720°.

The foregoing disclosure is merely illustrative of the exemplaryembodiments of the disclosure, and it shall be noted that thoseordinarily skilled in the art can also make a number of modificationsand variations without departing from the principle of the disclosure,and these modifications and variations shall also be regarded as fallinginto the scope of the present disclosure.

What is claimed is:
 1. A stop device, comprising: a motor rotor assembly including a rotating shaft; a first shift lever fixedly connected to the rotating shaft, the first shift lever comprising a first shifting part configured to rotate around an axis of the rotating shaft to form a first motion trajectory; a second shift lever rotatably connected to the first shift lever, the second shift lever comprising a second shifting part partially within the first motion trajectory, and the first shifting part being configured to drive the second shifting part to rotate around the axis of the rotating shaft to form a second motion trajectory; and a motor stator assembly sleeved on the rotating shaft and rotatably connected with the rotating shaft, the motor stator assembly comprising a stopping boss located on a periphery of the first motion trajectory and partially within the second motion trajectory, wherein: the first shift lever is configured to rotate for a total rotation angle greater than 360° and less than 720°; and the motor stator assembly comprises a receiving groove and the rotating shaft passes through the receiving groove, and each of the first shift lever, the second shift lever and the stopping boss is located within the receiving groove.
 2. The stop device according to claim 1, wherein the rotating shaft is configured to: drive the first shift lever and the second shift lever to rotate in a first direction until the second shifting part is brought into contact with the stopping boss, drive the first shift lever to rotate in a second direction opposite to the first direction until the first shifting part is brought into contact with the second shifting part, and drive, after the first shifting part is brought into contact with the second shifting part, the first shift lever and the second shift lever to rotate in the second direction.
 3. The stop device according to claim 1, wherein the rotating shaft is configured to: drive the first shift lever and the second shift lever to rotate in a first direction until the second shifting part is brought into contact with the stopping boss, drive the first shift lever to continue to rotate in the first direction until the first shifting part comes into contact with the second shifting part, and rotate in a second direction opposite to the first direction to drive the first shift lever and the second shift lever to rotate in the second direction.
 4. The stop device according to claim 1, wherein a distance between the first shifting part and the axis of the rotating shaft is less than a distance between the stopping boss and the axis of the rotating shaft, and a distance between the second shifting part and the axis of the rotating shaft is greater than the distance between the stopping boss and the axis of the rotating shaft.
 5. The stop device according to claim 1, wherein the motor rotor assembly comprises a housing, and the rotating shaft is arranged at a center of the housing.
 6. The stop device according to claim 5, wherein: the rotating shaft comprises a first connecting part arranged at the center of the housing and a second connecting part arranged on the first connecting part, the second connecting part including a first rotation stopping position, the first shift lever comprises a first rotating part arranged on the second connecting part, the first rotating part including a second rotation stopping position, and the first rotation stopping position and the second rotation stopping position fit with each other to restrict the first rotating part from rotating relative to the rotating shaft.
 7. The stop device according to claim 6, wherein the first rotation stopping position is a first tangential section arranged on the second connecting part, and the second rotation stopping position is a second tangential section arranged on the first rotating part.
 8. The stop device according to claim 6, further comprising: a locking nut, wherein the rotating shaft further comprises a third connecting part on which the locking nut is threadedly connected.
 9. The stop device according to claim 1, further comprising: a sleeve member connected between the first shift lever and the second shift lever to reduce a rotational friction between the first shift lever and the second shift lever.
 10. The stop device according to claim 9, wherein the sleeve member is a copper sleeve, and the sleeve member is fixedly arranged on the rotating shaft, wherein an end face of the sleeve member is against an end face of the first rotating part, and the second shift lever is sleeved on a periphery of the sleeve member and is configured to rotate relative to the sleeve member.
 11. The stop device according to claim 1, wherein the second shift lever is configured to rotate to drive the second shifting part to contact a first side of the stopping boss when rotating in a first direction and to contact a second side of the stopping boss when rotating in a second direction opposite to the first direction, the first side of the stopping boss and the second side of the stopping boss facing away from each other.
 12. The stop device according to claim 1, wherein the stopping boss includes a single stopping boss.
 13. The stop device according to claim 1, wherein the first shift lever is below the second shift lever.
 14. An aerial vehicle, comprising: a stop device including: a motor rotor assembly including a rotating shaft; a first shift lever fixedly connected to the rotating shaft, the first shift lever comprising a first shifting part configured to rotate around an axis of the rotating shaft to form a first motion trajectory; a second shift lever rotatably connected to the first shift lever, the second shift lever comprising a second shifting part partially within the first motion trajectory, and the first shifting part being configured to drive the second shifting part to rotate around the axis of the rotating shaft to form a second motion trajectory; and a motor stator assembly sleeved on the rotating shaft and rotatably connected with the rotating shaft, the motor stator assembly comprising a stopping boss located on a periphery of the first motion trajectory and partially within the second motion trajectory; and a payload rotatably connected with the stop device, wherein: the first shift lever is configured to rotate for a total rotation angle greater than 360° and less than 720°, and the stop device is configured to drive the payload to rotate.
 15. The aerial vehicle according to claim 14, wherein the payload is a camera assembly.
 16. A stop device, comprising: a motor rotor assembly including: a housing; and a rotating shaft arranged at a center of the housing, the rotating shaft comprising a first connecting part arranged at the center of the housing and a second connecting part arranged on the first connecting part, the second connecting part including a first rotation stopping position; a first shift lever fixedly connected to the rotating shaft, the first shift lever comprising: a first shifting part configured to rotate around an axis of the rotating shaft to form a first motion trajectory; and a first rotating part arranged on the second connecting part, the first rotating part including a second rotation stopping position, the first rotation stopping position and the second rotation stopping position fitting with each other to restrict the first rotating part from rotating relative to the rotating shaft; a second shift lever rotatably connected to the first shift lever, the second shift lever comprising a second shifting part partially within the first motion trajectory, and the first shifting part being configured to drive the second shifting part to rotate around the axis of the rotating shaft to form a second motion trajectory; and a motor stator assembly sleeved on the rotating shaft and rotatably connected with the rotating shaft, the motor stator assembly comprising a stopping boss located on a periphery of the first motion trajectory and partially within the second motion trajectory, wherein the first shift lever is configured to rotate for a total rotation angle greater than 360° and less than 720°. 